Top 5 Early Finishing Outdoor Strains - 2024 UPDATE

Lots of autoflowers planted outdoors

While patience is a virtue when it comes to growing, you don't have to suffer the pain of waiting. With early finishing outdoor strains, you'll get faster harvest periods for outdoor yields.

This is particularly useful when you need to take advantage of short bursts of fine weather.

Temperate climates, for instance, like the UK and Netherlands, benefit from quick growth through warmer spring, summer and early autumn seasons.

Late to the growing season? Then this is what you’re after. You needn't worry about compromises when it comes to these early finish outdoor strains, either.

You can pick from high-THC varieties that are packed with flavor and loaded with long-lasting effects.

If you need help with choosing or growing an early-finishing outdoor strain, please email us at [email protected] - one of our experts will be happy to help.


1. Black Jack autoflower (42-49 days)

Black Jack Auto from WeedSeedsExpress grown by Roberts on Growdiaries

Black Jack autoflower seeds grow incredibly fast, ready to harvest in just three months.

Despite the speedy growth, the buds are not rushed and can produce up to 250 grams per plant outdoors.

Black Jack delivers balanced effects that relax while also providing a surge of creative energy, perfect for music, poetry or story writing. This cross of Black Domina x Jack Herer combines fast flowering with substantial yields and versatile effects.

For maximum possible yields per plant, the photoperiod Black Jack strain is a better option without compromising on the key characteristics.

2. Northern Lights x Big Bud autoflower (42-49 days)

Northern Lights x Big Bud Auto from WeedSeedsExpress grown by Nedyah420 and Growing420_ABC on Growdiaries

Northern Lights x Big Bud autoflower seeds offer a quick turnover and calming, soothing indica effects that can induce sleep.

With 22% THC and 3% CBD, this strain delivers a strong high rounded out by CBD.

Despite the sedative qualities, Northern Lights x Big Bud also has an appealing earthy, sweet and citrus flavor profile. Fast flowering, having potent effects, and a pleasant taste makes this a hugely popular strain.

3. Sweet Tooth autoflower (42-49 days)

Sweet Tooth autoflower seeds are a great choice if you want a fast, mold-resistant strain.

With genetics from Afghanistan, Nepal, and Hawaii, Sweet Tooth thrives in warm climates. Despite a short stature, Sweet Tooth can produce up to 200 grams per plant outdoors. The big harvest offers sweet, fruity tropical buds.

The photoperiod Sweet Tooth yields more for patient growers, but the autoflower version packs impressive production into a fast, mold-resistant plant.

4. Hindu Kush autoflower (<49 days)

Hindu Kush autoflower seeds are a great choice for the end of the growing season because they flower quickly in less than 49 days.

The entire grow from seed to harvest takes only 2.5 months. You may even harvest in less than 2 months if you're lucky.

In return for the fast grow time, Hindu Kush delivers a bountiful harvest of sweet, woody buds that provide a powerful yet mellow high. This mountain strain has attracted growers since the 1960s for its calming effects.

If yield is more important than grow duration, the photoperiod Hindu Kush is a better option without losing the key effects.

5. Critical feminized (42-56 days)

Critical feminized seeds are a good photoperiod option for fast flowering. However, the vegetative time depends on sunlight hours, which diminishes at the end of the season, potentially reducing growth and yield.

Critical offers balanced effects - a relaxing body stone and creative head high from its Skunk and Big Bud genetics. It's also easy to grow.

For maximum speed and stealth, Critical Autoflower is better. But Critical feminized works well for fast flowering photoperiod plants at season end if you accept smaller yields.

Related Article: best outdoor cannabis strains


Looking For More Early Finishing Outdoor Strains?

We hope you found the perfect early-finishing outdoor strain for your grow.

If you need more early finishing options, please check out our full range of Autoflower seeds for outdoor growing. Autoflowers finish their lifecycle from seed to harvest in as little as 8-10 weeks.

Happy growing!